Fireplace insert



FIG. 1 is a perspective view of a fireplace insert, showing my new design and shown with the shield in the raised position;

FIG. 2 is a front elevational view thereof with the shield in the lowered position;

FIG. 3 is a right side elevational view thereof, the left side being the mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a fireplace insert, substantially as shown and described. 